Now I understand it at its full, and since then I began to improve my skills.

Sometime ago I readed a really interesting book of the work of the grand-master Jeffrey Jones. He told something really interesting:

"The first fan letters I wrote were to Mort Drucker and Al Williamson. Al Williamson wrote back a wonderful letter. I don´t know if Drucker ever even received the letter I sent. I had the gall to ask him the most embarrassing, lame question of all, which was, "Mr.Drucker, I love your work. Could you please tell me what size pen points you use?" Like that´s all there was to it. If I could find those points I could be a great artist. I could be Mort Drucker. [laughs] I don´t know how many times people have come and asked what size brush I use, pen points, paint, like it makes any difference. It dosn´t. If you can draw, you can draw on a paper bag with a burnt stick. [laughs]"

The book is published by Vanguard, it´s called "JeffreyJones Sketch book"

Hahaha!!
I will scan some drawings I've made on my phylosophy book and post them here so you can see what I can make with that little beast that pencil is
Well, I've scanned it already, here I have some of the many drawings I have on my books:

First of all sorry for not post yesterday, but I went to slept. I was tired.

Philosophy is amazing. I´m sure that your teacher is who make you bored.

I drew in classes too

Hehe! They look really spanish! They have "bandolero´s" faces!! I like the first one the most (the one who is shouting). Is the one who is more and goes out from the typical 3/4 stuff we all have the mania to draw.

The second seems that had a "permiso" for Xmas and left "Caravanchel" to visit his mom !!! I like his so wide eyebrown !!! Makes him seems dangerous !!!

As a "consejo": try to make different drawings every time. if you see the 3 faces you can see the same extructure with different details.

I had the same mistake. Only drawed 3/4 heads with torso. Right now I´m working hard with poses. They result me really difficult.

It´s rally hard to draw hands right now because I almost have never drawn them before...

Every time you draw try to make your drawing more and more complete, and more different.

Well, as this is becoming a Spanish thread, I'll tell to:
SEMPERE: I really like your drawing, though it is a bit "cartoonish" for my preferences, but I can tell when someone knows about proportions, anatomy, etc...even if they draw Mickey Mouse, and you know about all that. Great job.
RAGNAROK: Have you seen the thread "Final Sketch" from Mega? He uses the technique described by Sempere: the paper gives the color to the background, while you have to add shapes, the shadows, and the lighting (with a white pencil or so). It was a style often used in the Renaissance (no sé si se escribe así Renacimiento, pero bueno), as you can see in Michellangelo's and Leonardo's drawings.
And you should study more and draw less (this is what my parents used to tell me too...).
Again, Sempere, great pic.

No, I draw, write, etc with my right hand, why did you think I'm lefty?
Oh, and I have good marks on the exams, although Bachiller is much more difficult than ESO.
BTW, here it is a drawing I made during a really boring quimics class:

What I'm aiming with my lastest "portraits" is not learn the anatomy (which I should do) but to give them expression, an emotion.
I wonder if I achieve it...

I agree with you about anatomy importance.
But there´s a lot of determining factors that nobody should forgot.

I know a lot of artists who are able absolutely astounding representing reality as real as it is, but they are unable of make something of its own. They need reference material as air.

You should see this in the fantastic art field.

There´s who use the reference as it´s, a reference. But there is who pick up a photograph (or a model) and photocopy it in the media he/she is using adding some complements. The result will be, ironically, liveless paintings.

Are you sure if el señor Ibañez (the great master creator of Mortadelo y Filemon) or a lot of cartonisis are able to make a perfect anatomy study ?

I´m not.

But I´m sure that his drawings, his characters are alive !

That´s the important thing.
You can see characters as Snoopy or Garfield (or if you want something more actual Bone) and you will see a dog and a cat.

Well, tayete, I really tend to make my characters looking to the left, but in a canvas, the right represents de future, de left the past, the top the positive the bottom the negative. Therefor, I try to make positive characters looking at the right.
If you see my last character he is facing the left side and has an uncomfortable look.

Well, I think anatomy is the basis for everything. If you know how the muscles work, you can make your characters show any emotion you wish.
I asked about left-right handed, because I've noticed that most of right-handed people tend to draw figures looking to the left (seems easier), and lefties create right looking figures.
Anyway, maybe you are the exception, or maybe it was just an illusion.